(If you're an atheist, or someone who doesn't take the stories of prophets literally, then please don't answer this. I'd like to hear from people for whom prophets of God are a genuine possibility rather than myth or whatever)
Imagine: It's 2013, and you hear about a man who says he receives messages from God.
He says he has been chosen personally, by God, to bring God's teachings to everyone else on earth.
He says that anyone else who makes a similar claim is either lying or mad - that he is the one true prophet of God, and all others are false.
Let's assume that it is possible that he is telling the truth. Let's accept that God sometimes chooses individuals and employs them to spread his word, and that this might happen now.
If you believe that it can't happen now because the last of the prophets has already come and gone, please try to put aside that belief just for the purposes of this thought experiment. Subsititute "messenger of God" for prophet if you like. What we're interested here is people who claim God speaks to them directly.
Would you believe what he says, or would you be sceptical of his claims?
I think it's a fair assumption that you would not believe this man. You might laugh or get angry at him, and say that he himself is lying or mad. Or perhaps you might demand proof that he really does receive messages from God.
What would it take to convince you that this man is telling the truth, that he genuinely is a prophet of God?
And if nothing at all could convince you - why not?